Research On Heterogeneity Of Single Sand Body In Pu-Ⅰ Oil Group Of The Third Fault Block, Pubei Oil-field

Pubei oil field which located in southern Placanticline of Daqing, underwaterdistributary channel deposits is the mainly reservoir, the sand body presents as bandingdiscontinuous banding lenticel and scattered.Based on all available geology research result, the author collected and processed thedata of176oil wells which include the core data the well log data the dynamic and the staticdata and the production data, consult modern sedimentology and sonic logging, by using themethod such as empirical formula linear regression synthetic index, systematically make acomprehensive research on single sand body included the inner physical parameter thedistribution of the interlayer morphological characters and the relationship between thesynthetic index and the distribution of the residual oil.This thesis takes Pu-I oil group of the third fault block, Pubei Oil-field as the researchingobject and work out the inner physical parameter by firs normalize the well logging curve andthen by deduce empirical formula and linear regression analysis to build the physicalparameter interpretation model of shale content permeability and porosity, and by using suchas delta deposit model and random modeling ways to discriminate the building-block of thesingle sand body meanwhile we do some further research from the flowing five aspects thesand types the shape of sand the sand structural characteristics the thickness of sand variesand the parameter’s distributing. At last with the heterogeneity in single sand body we do acomprehensive assessment, the main method is analytic hierarchy process which work outeach evaluates parameter weight then the heterogeneous of the inner single sand body was becalculated in order to analyze the single sand body injection-production in the end clear-cutthe distribution of residual oil.We classified the single sand body in the research area as five genetic types through ageologic investigation such as multi-phase superimposed river sub-water channel singlechannel sand sheet and lenticular sand, during the five the multi-phase superimposedsub-water channel and the lenticular sand has the better potentials for the further research inview of the characteristic of the residual oil in the potential areas to the19types ofinjection-production tapping potential were established. The research not only contribute toimprove the later high water cut stage of pubei oil field but also a direction to the oil fieldcharacterized of deposition with narrow channel sand body, this with a larger promoteprospect.